Tin base alloy containing aluminum, zinc and copper

ABSTRACT

An alloy for a jewelry metal consisting of at least 50 percent tin, and aluminum, zinc and copper, has high brightness and improved tarnish resistance.

United States Patent Monaco 1 Mar. 21, 1972 [54] TIN BASE ALLOY CONTAINING [56] References Cited ALUMINUM, ZINC AND COPPER UNITED STATES PATENTS Inventor: Luigi Monaw, 270 Amityville Street, Islip 579,396 3/1897 Kemler ..75/11s Terrace, NY. 11752 587,303 8/1897 Ellis ..75/l75 [22] Filed: AP 4 1969 941,835 11/1909 Wirgovits ..75/175 2 APPL 13 71 Primary Examiner-L. Dewayne Rutledge Assistant ExaminerE. L. Weise Attorney-Camil P. Spiecens [52] U.S. Cl. ..75/l75 R [51] int. Cl t ..C22c 13/00 1 ABSTRACT [58] Field of Search ..75/175 A all y f r a jewelry metal consisting of at least 50 percent tin, and aluminum, zinc and copper, has high brightness and improved tarnish resistance.

2 Claims, No Drawings TIN BASE ALLOY CONTAINING ALUMINUM, ZINC AND COPPER This invention pertains to a novel alloy having suitable properties for use in making ornamental or inexpensive jewelry articles.

An object of the invention is to provide a novel metal which can be substituted for bronze, brass, nickel and silver having better physical properties than such metals.

A further object of the invention is to provide a novel metal for use in making ornamental work, flatware and jewelry.

A still further object of the invention is to provide a novel metal which can be used in articles wherein silver, nickel or chromium plating is normally required since the metal is noncorrosive and does not tarnish.

Another object of the invention is to provide a novel metal which is easily rolled, stamped or drawn as well as being suitable for all kinds of casting or molding.

The alloy of this invention consists basically of a mixture of tin, aluminum, zinc and copper. More specifically, the percentage of tin should be greater than 51 percent and the percentage of each of the other elements is in the range of 2 to 25 percent.

A first example of the alloy is:

a. Tin 65% b. Aluminum 207:

c. Zinc [0% (1. Copper 5% A second example of the alloy is a. Tin 75% b. Aluminum 87:

c. Zinc 15% d. Copper 2% The alloy is compounded by melting the ingredients together at the required temperature of 700-750 Fahrenheit.

I claim:

1. A metal alloy consisting of tin 65 percent, aluminum 20 percent, zinc 10 percent and copper 5 percent.

2. A metal alloy consisting of tin 75 percent, aluminum 8 percent, zinc 15 percent and copper 3 percent. 

2. A metal alloy consisting of tin 75 percent, aluminum 8 percent, zinc 15 percent and copper 3 percent. 